Cutter for cigarette-rod machines



. 0a. 1.14 A924v 1,511,284 E." VKOERNER CUTTER FOR CIGARETTE ROD MACHINES Filed Jan. 11 1924 NVENTOR BY I 970% f ATTORNEY Patented @ct 14, 1924.

UNITE STATES PATENT OFFICE.

E'WAIJD KOERIQI'IER 0F DRESDEN, GERMANY. ASSIGNGR TO UNITED CIGARETTE MA- CHINE 00.. INQ, OF LYNCHBURG, VIRGINIA, CQRIURATIQN (3F VIRGINIA.

CUTTER FOR GEGAPJETTEROID MACHINES.

Application filed January 11 1924.

To all whom it may concern:

Be it known that I Euninn KonRNnR, a citizen of the Republic of Germany and resident of Dresden Germany, have invented certain new and useful improvements in Gutters for Cigarette-Rod ltlachines, of which the followii'ig is a specification.

This invention relates to cigarette machines of the continuous rod type, and re lates more particularly to an improved cutter for such cigarette machines A principal object of the present invention comprehends the provision of a cutter for cigarette rod machines which is constructed and designed so that during operation of the machine the cutting edge and the body of the knife of the cutter are protected against injury or damage when the knife strikes an obstruction such as a foreign substance in the feeding cigarette rod.

.k further object of the invention centers about the provision of a cutter provided with a knife which is so mounted on the cut ter support as to produce a drawing out into the cigarette rod to be cut" and in which the knife is so mounted or supported that when an obstruction is met the knife will be moved relatively to the cigarette rod and relatively to its support into a position to shield or protect the same against damage and to maintain the same intact.

Still further objects of the invention include the provision of a cutter device in which the knife thereof is constructed to provide interchangeable cutting edges, the said knife being designed and constructed so as to be replaceable at a relatively low cost.

To the accomplishment of the foregoing and such other objects as may hereinafter appear, my invention consists in the elements and their relation one to the other, as hereinafter particularly described and sought to be defined in the claims, reference being had to the accompanying drawings which show a preferred embodiment of" my invention, and in which:

Fig. 1 is a fragmentary elevational view of the cutter device, and

Fig. 2 is a view taken in cross-section on the line AB, Fig. 1.

Referring now more in detail to the drawings, the cutter device of my present invention comprises a cutter support generally designated as s, the said support carrying erial No. 685,534.

a knife arranged to move periodically into cooperation with the cutting tube a and the continuous cigarette rod fed therethrough for cutting the rod into the usual. cigarette lengths.

as heretofore mentioned, a prime desideratum of the present invention comprehends the provision of a cutter in which the knife is so constructed and mounted on the knife support that when the knife strikes an obstruction in the feeding cigarette rod, it will move relatively to the support into a protected position against injury or darnage. mounted on the support a by means which normally fixedly holds the knife on the support and which is rupturable so as to permit the knife to move relatively to the support when the knife comes in contact with foreign substances in the cigarette rod.

In the preferred construction as exemplified in the drawinga the support 8 coinprises a pair of rotary disks 2 and 3 fixed to the cutter shaft 1 between the collar 10 and a washer 11 and secured by means of a nut 4- threadedly received by the end of the shaft 1. The knife 5 is arranged between the disks 2 and 3 and is supported on the disks by means of a pivot pin 6 and a rupturable or shear pin 7 carried by the disks, the material of the shear pin being such that the pin is shorn off by the knife, which consists of a hard and thin steel as soon as the knife strikes upon foreign substances in the tobacco rod such as nails, iron particles or the like. l i ith this construction it will be seen that when the knife meets an obstruction, the rupturable or shear pin 7 will be broken to permit the knife to move about the pivot pin 6 and into and between the rotary disks, the said knife being therefore prevented from being damaged by the 0bstruction and the knife being moreover protectively shielded or housed when moved into the supporting disks.

In the preferred construction the knife is made in the shape of an oval, and is mounted eccentrically on the support .9 so as to produce a draw-cut action when the same is moved into engagement with the cigarette rod, the said oval-shaped knife being preferably ground on the upper edge 5 as well as on the lower edge o so as to be interchangeable for use on both sides of the same.

To accomplish this the knife 5 is.

For the purpose of permitting the re treat of the knife into the disk support when the shear pin is cut and for the purpose of limiting the outward motion of the knife due to centrifugal action at such time, there is provided a pin and slot connection in the support and knife which comprises a slot or opening 8 in the knife, into which projects the stop pin 9 fastened on the disks 2 and 3, the opening 8 being greater than the diameter of the pin 9 so as to permit the inward or retreating movement while limiting the outward movement of the knife.

I am aware that it has heretofore been proposed to provide knives for the cutting device which are loosely arranged on disks and operated by means of a spring to resiliently'move the same into engagement with. the tobacco rod when the latter is to be cut. These spring operated knives, however, are objectionable and do not accomplish the results of the present invention, since if any sort of foreign substance is contained in the tobacco rod, such as iron particles upon which the knife strikes, the latter will be damaged, and since furthermore the functioning of the knife is made to depend upon springs. which, as is well known, are subject to variation of tension and breakage,

' especially when operated in cigarette rod machines.

While I have shown and described my device in the preferred form, it will be obvious that many changes and modifications including a rupturable means which is adapted to be broken when the knife strikes an obstruction so that the knife is permitted to move relatively to the support to prevent damage thereto.

2; A cutter for cigarette rod machines comprising a rotary knife support, a knife and means fixedly mounting the knife on said support comprising a pivot pin and a I J means supporting the knife on the dlSkS adapted to be broken when the knife strikes an obstruction.

4. A cutter for cigarette rod machines mp ng a pai of rotary disks, a knife arranged between said disks and means supporting the knife on the disks including a pivot pin and a shear pin.

5. A cutter for cigarette rod machines comprislng a pair of rotary disks, an ovalshaped knife provided with opposite and interchangeable cutting edges arranged between said disks, and rupturable means supporting the knife on the disks.

6. A cutter for cigarette rod machines comprising a rotary support, a knife and means for supporting the knife ez'centri- 7 cally on the support with the cutting edge of'the knife arranged to project from the support and to produce a drawing cut into the cigarette rod, the said means being rupturable. a

7. A cutter for cigarette rod machines comprising a pair of rotary disks, a knife provided with interchangeable cutting edges arranged between the disks, means for fixedly and eccentrically' supporting the knife on the disks with the cutting edge of the knife arranged to produce a drawing cut into the cigarette rod to be cut, the said means comprising a pivot pin and a shear pin, the latter adapted to be ruptured when the knife strikes an obstruction in the cigarette rod, and pin and slot means in the support and knife constructed to permit inward or retreating movement of the knife between the disks and to limit the outward movement of the knife when the shear pin is ruptured.

Signed at Dresden, Germany, this 12th day of December A. D. 1923.

EWALD KOERNER. 7 

